Podcast feed isn't updating - Podcast Connect shows that they are Published but do not show up

There are 7 episode for thie year in the feed. All appear when subscribing on a Mac, where feed is read directly and the iTunes Store/Podcasts Connect is not involved.

However when looking at the web preview at the URL you gave, and 'Browse' in t4he podcasts app on a Mac (which works from Podcasts connect) the episode of March 8 is missing. I've looked at the feed coding and checked it on two validators, without seeing any problems. Your 'itunes:block' tag for this episode is set to 'no'. If it was previously set to 'yes' it's possible that Podcasts Connect - which caches the feed - has not yet checked it, which it does in some sort of rotation and can take a cycle of around two days. If this is the case the episode should appear eventually.